A methodology for low-speed broadband rotational energy harvesting using piezoelectric transduction and frequency up-conversion

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Title: A methodology for low-speed broadband rotational energy harvesting using piezoelectric transduction and frequency up-conversion
Author(s): Fu, H
Yeatman, EM
Item Type: Journal Article
Abstract: Energy harvesting from vibration for low-power electronics has been investigated intensively in recent years, but rotational energy harvesting is less investigated and still has some challenges. In this paper, a methodology for low-speed rotational energy harvesting using piezoelectric transduction and frequency up-conversion is analysed. The system consists of a piezoelectric cantilever beam with a tip magnet and a rotating magnet on a revolving host. The angular kinetic energy of the host is transferred to the vibration energy of the piezoelectric beam via magnetic coupling between the magnets. Frequency up-conversion is achieved by magnetic plucking, converting low frequency rotation into high frequency vibration of the piezoelectric beam. A distributed-parameter theoretical model is presented to analyse the electromechanical behaviour of the rotational energy harvester. Different configurations and design parameters were investigated to improve the output power of the device. Experimental studies were conducted to validate the theoretical estimation. The results illustrate that the proposed method is a feasible solution to collecting low-speed rotational energy from ambient hosts, such as vehicle tires, micro-turbines and wristwatches.
Publication Date: 23-Feb-2017
Date of Acceptance: 20-Feb-2017
URI: http://hdl.handle.net/10044/1/57609
DOI: https://dx.doi.org/10.1016/j.energy.2017.02.115
ISSN: 0360-5442
Publisher: Elsevier
Start Page: 152
End Page: 161
Journal / Book Title: Energy
Volume: 125
Copyright Statement: © 2017 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Physical Sciences
Technology
Thermodynamics
Energy & Fuels
Rotational energy harvesting
Piezoelectric
Frequency up-conversion
Magnetic plucking
Low-speed
Broadband
DESIGN
MOTION
GENERATOR
SYSTEM
Science & Technology
Physical Sciences
Technology
Thermodynamics
Energy & Fuels
Rotational energy harvesting
Piezoelectric
Frequency up-conversion
Magnetic plucking
Low-speed
Broadband
DESIGN
MOTION
GENERATOR
SYSTEM
0913 Mechanical Engineering
0915 Interdisciplinary Engineering
Energy
Publication Status: Published
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering
Aeronautics
Faculty of Natural Sciences



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